tmr.h File Reference

Timer functions for the BEEP-8 system. More...

Go to the source code of this file.

Functions
int	b8TmrSetup (u32 tmr_ch, u32 cycval)
	Set up a timer with a specified cycle value.
int	b8TmrWait (u32 tmr_ch)
	Wait for a timer interrupt.

Detailed Description

Timer functions for the BEEP-8 system.

This file provides function prototypes for timer setup and wait operations in the BEEP-8 system. It includes functions to configure and wait for timer interrupts.

Functions provided:

• b8TmrSetup: Set up a timer with a specified cycle value
• b8TmrWait: Wait for a timer interrupt

Example usage (prints 10 characteres every second):

#define TIMER_CH (2)
#define TIMER_HZ (10)
 
int main(void){
  b8TmrSetup(TIMER_CH, (b8SysGetCpuClock() / TIMER_HZ) >> 8);
  while(1){
    b8TmrWait(TIMER_CH);
    printf("T");
  }
  return 0;
}

For more detailed information, please refer to the BEEP-8 data sheet.

Function Documentation

b8TmrSetup()

int b8TmrSetup ( u32 tmr_ch, u32 cycval )

extern

Set up a timer with a specified cycle value.

This function configures the specified timer channel with the given cycle value. It sets the timer mode to periodic, initializes the counter and period registers, and enables the timer. Additionally, it sets up an IRQ wait handler for the timer.

Parameters

tmr_ch	The timer channel to set up.
cycval	The cycle value for the timer.

Returns

0 on success; an error code on failure.

b8TmrWait()

int b8TmrWait ( u32 tmr_ch )

extern

Wait for a timer interrupt.

This function waits for an interrupt from the specified timer channel. It blocks until the timer interrupt occurs.

Parameters

tmr_ch

The timer channel to wait for.

Returns

0 on success; an error code on failure.